Alf Tande-Petersen, nicknamed Tande-P (born 9 October 1950), is a Norwegian television personality, journalist, writer and businessperson. In his early career he wrote for newspapers and was a radio presenter, and he has released books in several genres, mostly humor and crime novels. He was also behind various revues and stage shows. As a television presenter he was very successful, peaking in 1992 with the show Tande-På programmet which at times was viewed by almost half of Norway's population. He also had a business venture as a restaurant owner, but after three years the companies went bankrupt.
He started as a journalist in 1969, as a sports journalist in Adresseavisen. He also worked three years in Vesterålen. He became known as a writer of humorous texts in the newspaper Dagbladet. Humorous books include Folk og demoner i Løvebakken Monarki (1981), 1984 år'reit (1984), Gjør det! (1986), Tande-P'å Tur: Tjo-fadderittan (1987). He also reworked books by Stephen Pile (author of The Book of Heroic Failures) into Norwegian, in Tidenes tabber (1989) and Flere tabber (1990). He cooperated with Klaus Hagerup, and they released a young adult book in 1989, a humour book in 1991 and a play in 1992. The 1992 humour book På kanten was written together with Tore Skoglund. The 1992 book Det ble en gutt was dedicated to fatherhood, and was one of the first books written about this in a humorous, tongue-in-cheek way which later became a subgenre of sorts. He later switched to crime novels, and has issued Bedre sant enn aldri (1995), Evnukken (1996) and Fisherman's Friend (1999). In 2007 he released three books; the crime novel Fiskene, a humorous book about the Øivind Blunck's persona "Fridtjof" and a non-fiction book about the Operation Archery.
Tande-Petersen has cooperated closely with Øivind Blunck. They first developed the persona Reidar in the 1980s, and later the persona Fridtjof. They have co-written several stage shows, including ... blunk Blunck and Fridtjof for fulle mugger!, as well as the televised mini-movie Fridtjofs Jul. Tande-Petersen has also written various revues, commercials and has been a stage entertainer.